There seems to be some work to be done regarding iOS 10 compatability. I'm on iOS 10 Public Beta 2. The most important problem is, On-Off switch style settings in the Settings screen are not saved and are shown as Off all the time, though the app behavior is not like that.

The second issue I noticed is, though I did not find any direct relationship with any other visible problem, during the first start of the app, iOS warns about the app not being 64bit compatible and that this may cause performance problems..

iOS 10 final/production release is officially available earlier for beta testers. Settings screen is still broken, which makes the game experience almost totally unconfigurable for users who upgrade to iOS 10 (which will be many, by the end of next week, with the public availability of iOS 10).
I am looking forward to download the app update. If possible and there is a need for that, I am also eager for beta testing and giving feedback.